585: Difference between revisions
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primarily in the impedance of the signal interface between the plug-in and the scope. | primarily in the impedance of the signal interface between the plug-in and the scope. | ||
The [[81|Type 81]] adapter allows the use of letter-series and 1-series plug-ins in a 585. | The [[81|Type 81]] adapter allows the use of letter-series and 1-series plug-ins in a 585. | ||
The original 585 has a tube trigger circuit which was replaced by [[tunnel diodes|tunnel diode]] triggering in the 585A. | The original 585 has a tube trigger circuit which was replaced by | ||
[[tunnel diodes|tunnel diode]] triggering in the 585A. | |||
Both use a [[distributed amplifier]] for vertical deflection. | Both use a [[distributed amplifier]] for vertical deflection. | ||
Unlike other 500-series scopes, the 585 CRT has distributed vertical deflection plates, | Unlike other 500-series scopes, the 585 CRT, | ||
enabling it to have both high sensitivity and fast risetime. | the [[T581]], has distributed vertical deflection plates, | ||
enabling it to have both high sensitivity and fast risetime. | |||
The total CRT acceleration voltage is 10kV. | |||
Several improvements were published for the 585 circuitry, including the enhanced trigger | Several improvements were published for the 585 circuitry, including the enhanced trigger | ||
circuit. If all of those changes are applied to a 585, it is essentially a 585A. | circuit. If all of those changes are applied to a 585, it is essentially a 585A. | ||
A rackmount version was also made. | A rackmount version was also made. | ||
Revision as of 11:59, 27 November 2011
The Type 585 is a 100MHz 580-Series scope introduced by Tektronix in 1959 and made through the 1960's. The 585 uses 580-series plug-ins, which look like letter-series and 1-series plug-ins but are electrically different, primarily in the impedance of the signal interface between the plug-in and the scope. The Type 81 adapter allows the use of letter-series and 1-series plug-ins in a 585. The original 585 has a tube trigger circuit which was replaced by tunnel diode triggering in the 585A. Both use a distributed amplifier for vertical deflection. Unlike other 500-series scopes, the 585 CRT, the T581, has distributed vertical deflection plates, enabling it to have both high sensitivity and fast risetime. The total CRT acceleration voltage is 10kV.
Several improvements were published for the 585 circuitry, including the enhanced trigger
circuit. If all of those changes are applied to a 585, it is essentially a 585A.
A rackmount version was also made.
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Front view.
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585A trigger circuit.
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White plastic clip holds tunnel diode for triggering.
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Inside view shows regulator tubes.
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Distributed vertical amplifier.
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RM-585A
